Algorithmic Advances for Software Radios

Abstract

Software radios replace most communication hardware with software. Software radios require new algorithms. Demodulation is the bottleneck in a software 802.11b implementation. Standard maximum-likelihood demodulator based on the fast Walsh-Hadamard transform (FHT). Majority-logic demodulations are efficient but suboptimal. Our hybrid algorithm is almost as fast as majority logic and almost as "optimal" as the FHT. Noise-adaptive algorithms can save power and improve battery life. The flexibility of software radios allows the best algorithms to be chosen at run time.

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Document Details

Document Type
Technical Report
Publication Date
May 21, 2003
Accession Number
ADA419766

Entities

People

  • Matthew Frigo

Tags

DTIC Thesaurus Topics

  • Abstracts
  • Algorithms
  • Availability
  • Classification
  • Contracts
  • Demodulation
  • Demodulators
  • Information Operations
  • Instructions
  • Mobile Phones
  • Modulation
  • Monitoring
  • Resilience
  • Standards

Fields of Study

  • Computer science
  • Engineering

Readers

  • Operations Research
  • Radio communications and signal processing.
  • Software Engineering.